我正在模拟Java中的超人飞行。

如何进行同时考虑向右箭头键和向左箭头键的事件?

我将每个箭头的事件设置如下:

 public void keyPressed(KeyEvent e)
{
 int KeyCode=e.getKeyCode();

 switch(KeyCode)
 {
     case KeyEvent.VK_LEFT:
         supermanleft.moveLeft();
         break;
     case KeyEvent.VK_RIGHT:
         supermanfly.moveRight();
         break;
     case KeyEvent.VK_UP:
         superman.moveUp();
         break;
     case KeyEvent.VK_DOWN:
         superman.moveDown();
         break;
 }
}


当我同时单击两个箭头时,超人返回。

最佳答案

同时按下两个键时,每个键都会调用keyPressed。您可以保持一组按键,然后查看是否需要按下两个键:

private Set<Character> pressed = new HashSet<Character>();

public synchronized void keyPressed(KeyEvent e) {

    pressed.add(e.getKeyChar());

    if (pressed.size() > 1) {
        //check if pressed contains what you want it to contain
    } else {
       //only one key is pressed - act as normal
    }
}

public synchronized void keyReleased(KeyEvent e) {
    //don't forget to remove when released:
    pressed.remove(e.getKeyChar());
}


希望这可以帮助。

10-08 02:53